How much does window replacement cost in Ontario?

Most Ontario projects land between $475 – $1,600, with an average near $895. Local crews quote roughly $475 – $2,650 per window installed.

What is included in the Ontario price per window installed?

Typically materials, labor and cleanup. Permits, disposal and access challenges are usually quoted separately.

Unit pricing

Ontario window replacement pricing per window installed

Window Replacement cost per window installed in Ontario, California in 2026.

Low

$475

Average

$895

High

$1,600

Ontario crews quote about $475 – $2,650 per window installed.

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Multiply local unit rates by your real measurements.

What drives window replacement prices in Ontario

Local labor, permitting and climate move Ontario prices away from the national average.

Labor market

Licensed Ontario contractors carry California workers' comp and prevailing wage pressure, and crews here quote roughly 5% above the national labor average. Demand in the Inland Empire market peaks in spring, so booking early usually beats a rush premium.

Permits

Ontario follows the California Building Standards Code, so most structural, electrical, plumbing and re-roof work needs a permit from the Ontario building department plus Title 24 energy compliance. Inland Empire jurisdictions add high-wind and fire-hardening requirements in foothill zones.

Climate

Ontario sits in a hot, dry inland climate with Santa Ana wind events, so expect wind-rated fasteners, fire-resistant materials and heat-tolerant finishes.

Ontario unit pricing by material

Vinyl$475 – $1,250

Composite$685 – $1,600

Aluminum$525 – $1,450

Wood$840 – $2,300

Wood with aluminum cladding$1,000 – $2,750

Fiberglass$945 – $2,500

Ways to lower your Ontario price

Do the whole house at once — per-window labor drops sharply after the first few openings.
Choose insert installs when the existing frames are sound; that alone saves 25–35%.
Claim the 25C federal tax credit: 30% of cost, up to $600 per year for qualifying ENERGY STAR windows.
Standard sizes and stock colors cost far less than custom shapes or dark exterior finishes.
Buy in winter — window companies discount hardest in their slow season.

Ontario questions

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